Methenyltetrahydromethanopterin cyclohydrolase
In enzymology, a methenyltetrahydromethanopterin cyclohydrolase (EC3.5.4.27) is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are 5,10-methenyl-5,6,7,8-tetrahydromethanopterin and H2O, whereas its product is 5-formyl-5,6,7,8-tetrahydromethanopterin.